21459920

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 53032320

約数和(自身を除く): 31572400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 107, 109, 115, 184, 214, 218, 230, 368, 428, 436, 460, 535, 545, 856, 872, 920, 1070, 1090, 1712, 1744, 1840, 2140, 2180, 2461, 2507, 4280, 4360, 4922, 5014, 8560, 8720, 9844, 10028, 11663, 12305, 12535, 19688, 20056, 23326, 24610, 25070, 39376, 40112, 46652, 49220, 50140, 58315, 93304, 98440, 100280, 116630, 186608, 196880, 200560, 233260, 268249, 466520, 536498, 933040, 1072996, 1341245, 2145992, 2682490, 4291984, 5364980, 10729960, 21459920]

約数ペア:

[(1, 21459920), (2, 10729960), (4, 5364980), (5, 4291984), (8, 2682490), (10, 2145992), (16, 1341245), (20, 1072996), (23, 933040), (40, 536498), (46, 466520), (80, 268249), (92, 233260), (107, 200560), (109, 196880), (115, 186608), (184, 116630), (214, 100280), (218, 98440), (230, 93304), (368, 58315), (428, 50140), (436, 49220), (460, 46652), (535, 40112), (545, 39376), (856, 25070), (872, 24610), (920, 23326), (1070, 20056), (1090, 19688), (1712, 12535), (1744, 12305), (1840, 11663), (2140, 10028), (2180, 9844), (2461, 8720), (2507, 8560), (4280, 5014), (4360, 4922)]